Clue did have one dormmate who looked out for him... but Narcissus Laurent wasn't fussed about how he dressed. It seemed Narcissus liked him despite all his many oddities and foibles.

He nodded firmly at the "spidery" robe, then found the smallest one they had and draped it over his arm to buy. He blinked over at Miss Potts. "Maybe you should buy something too. Something green... you know, for the grass stains..."